diff options
Diffstat (limited to 'networking/udhcp/leases.c')
| -rw-r--r-- | networking/udhcp/leases.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c index ceec07345..997daea6c 100644 --- a/networking/udhcp/leases.c +++ b/networking/udhcp/leases.c @@ -95,24 +95,26 @@ struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr) /* check is an IP is taken, if it is, add it to the lease table */ -static int check_ip(uint32_t addr) +static int nobody_responds_to_arp(uint32_t addr) { static const uint8_t blank_chaddr[16]; /* 16 zero bytes */ struct in_addr temp; + int r; - if (arpping(addr, server_config.server, server_config.arp, server_config.interface) == 0) { - temp.s_addr = addr; - bb_info_msg("%s belongs to someone, reserving it for %ld seconds", - inet_ntoa(temp), server_config.conflict_time); - add_lease(blank_chaddr, addr, server_config.conflict_time); - return 1; - } + r = arpping(addr, server_config.server, server_config.arp, server_config.interface); + if (r) + return r; + + temp.s_addr = addr; + bb_info_msg("%s belongs to someone, reserving it for %u seconds", + inet_ntoa(temp), (unsigned)server_config.conflict_time); + add_lease(blank_chaddr, addr, server_config.conflict_time); return 0; } -/* find an assignable address, it check_expired is true, we check all the expired leases as well. +/* find an assignable address, if check_expired is true, we check all the expired leases as well. * Maybe this should try expired leases by age... */ uint32_t find_address(int check_expired) { @@ -129,15 +131,14 @@ uint32_t find_address(int check_expired) if ((addr & 0xFF) == 0xFF) continue; /* Only do if it isn't assigned as a static lease */ - if (!reservedIp(server_config.static_leases, htonl(addr))) { - + ret = htonl(addr); + if (!reservedIp(server_config.static_leases, ret)) { /* lease is not taken */ - ret = htonl(addr); lease = find_lease_by_yiaddr(ret); /* no lease or it expired and we are checking for expired leases */ if ((!lease || (check_expired && lease_expired(lease))) - && /* and it isn't on the network */ !check_ip(ret) + && nobody_responds_to_arp(ret) /* it isn't used on the network */ ) { return ret; } |